"How are you?" said he. "Will you come in?"

The policeman did so. He was a huge-chested and heavy-limbed fellow, and had a head of fiery red hair. He surveyed Ashton-Kirk with a grin upon his good-natured face.

"Oh, hello," said he. "So it's you, is it? I noticed you the other day with Osborne while I was keeping the gate, outside."

"Sure enough," said the secret agent; "so you were."

"I was on the corner beyant, there," went on the red-haired giant, "and divil the thing was I expecting when the blast of the whistle struck me two ears. Sure, there's seldom anything happens in the place; it's like a graveyard, faith; and to have a thing like that go off all of a sudden fair took my breath."

"It was a call for a man whom I thought was close by," explained the secret agent, as the old woman left them together in the library.

The policeman winked with much elaboration.

"I see, I see," said he. "A friend wid a good eye and a careful manner. Sure, it's meself who's seen him often enough of late; but I thought he was a headquarters man put here by Osborne."

Ashton-Kirk regarded him thoughtfully.